Indian Space Research Organisation

Indian Space Research Organisation
Name	Indian Space Research Organisation
Abbreviation	ISRO
Established	15 August 1969
Headquarters	Bengaluru, Karnataka, India
Primary spaceport	Satish Dhawan Space Centre
Administrator	S. Somanath
Budget	139.1, b

Indian Space Research Organisation. It is the national space agency of India, operating under the Department of Space. Established in 1969, the organisation has grown from conducting initial experiments with sounding rockets to becoming a major global player in space technology, satellite communication, and planetary exploration. ISRO is renowned for its cost-effective and reliable launch services, a diverse fleet of satellites, and ambitious interplanetary missions.

History

The origins of the agency trace back to the formation of the Indian National Committee for Space Research (INCOSPAR) in 1962, under the visionary leadership of scientist Vikram Sarabhai, often regarded as the father of the Indian space programme. Early experiments were conducted from the Thumba Equatorial Rocket Launching Station (TERLS) using imported sounding rockets like the Nike-Apache. The success of India's first satellite, Aryabhata, launched in 1975 by the Soviet Union, demonstrated nascent capabilities. The formal establishment of the organisation in 1969 marked a pivotal shift towards indigenous development, leading to the creation of the Satellite Launch Vehicle (SLV) programme under the guidance of A. P. J. Abdul Kalam. Subsequent decades saw the evolution of more powerful launch vehicles and the operationalisation of the Indian Remote Sensing (IRS) and Indian National Satellite System (INSAT) fleets, cementing its role in national development.

Organisation and structure

The agency functions under the administrative control of the Department of Space (DoS), which reports directly to the Prime Minister of India. The department is headquartered in Bengaluru, with its chairman also serving as the Secretary of the DoS. Key operational centres include the Vikram Sarabhai Space Centre (VSSC) in Thiruvananthapuram for launch vehicle development, the U R Rao Satellite Centre (URSC) in Bengaluru for satellite design, and the Satish Dhawan Space Centre (SDSC) in Sriharikota as the primary launch facility. Other vital units are the Liquid Propulsion Systems Centre (LPSC), the Space Applications Centre (SAC) in Ahmedabad, and the Indian Deep Space Network (IDSN) complex at Byalalu. The commercial arm, NewSpace India Limited (NSIL), handles commercial launches and technology transfer.

Launch vehicles

The organisation has developed a robust family of expendable launch systems. The workhorse is the Polar Satellite Launch Vehicle (PSLV), renowned for its reliability in launching Earth observation and lunar satellites, including the historic Chandrayaan-1. The more powerful Geosynchronous Satellite Launch Vehicle (GSLV) and its enhanced Mark III variant, now called the LVM3, are capable of placing heavy communication satellites into geostationary transfer orbit and conducted the Crew Module Atmospheric Re-entry Experiment (CARE). For smaller payloads, the Small Satellite Launch Vehicle (SSLV) provides dedicated, on-demand access to space. Development of next-generation systems like the semi-cryogenic SC-120 engine and the reusable RLV-TD technology demonstrator is ongoing.

Satellite programmes

Its satellite fleet is broadly categorized into communication, Earth observation, and scientific satellites. The Indian National Satellite System (INSAT) and the newer GSAT series provide critical telecommunications, broadcasting, and meteorological services across South Asia. The Indian Remote Sensing (IRS) programme, including satellites like Cartosat and Resourcesat, supports applications in agriculture, disaster management, and urban planning. Notable scientific missions include the Astrosat space observatory, India's first dedicated multi-wavelength astronomy mission. Recent advanced satellites include the EOS-01 radar imaging satellite and the GISAT-1 Earth observation satellite for real-time monitoring.

Human spaceflight programme

The ambitious Gaganyaan programme aims to demonstrate India's human spaceflight capability by launching a crew of three astronauts into low Earth orbit for up to seven days. The programme involves developing critical technologies like the human-rated LVM3, the Orbital Module comprising a Crew Module and Service Module, and a comprehensive astronaut training programme in collaboration with agencies like Roscosmos. Preceding unmanned test flights, such as the Gaganyaan TV-D1 mission, are validating crew escape systems and orbital module performance. The selected astronaut candidates, identified as the Gaganyaan astronauts, are undergoing extensive training at facilities including the ISRO Human Space Flight Centre in Bengaluru.

International cooperation

The agency maintains extensive global partnerships, providing launch services for satellites from countries including the United States, United Kingdom, Singapore, and Germany through its commercial arm. It is a key contributor to international endeavours like the NASA-ISRO Synthetic Aperture Radar (NISAR) mission. Collaborative projects with European Space Agency (ESA), Japan Aerospace Exploration Agency (JAXA), and Centre National d'Études Spatiales (CNES) of France span climate monitoring and technology development. It also plays a leading role in the South Asian Association for Regional Cooperation (SAARC) satellite initiative, sharing communication and disaster management resources with neighbouring countries.

Achievements and future projects

Landmark achievements include the Mars Orbiter Mission (Mangalyaan), which made India the first Asian nation to reach Martian orbit on its first attempt, and the Chandrayaan-1 mission, which confirmed the presence of water molecules on the Moon. The Chandrayaan-3 mission successfully soft-landed near the lunar south pole. Future interplanetary goals include the Venus Orbiter Mission (Shukrayaan) to study the atmosphere of Venus and a proposed mission to Mars. Other major projects in development are the Indian Data Relay Satellite System (IDRSS) to support Gaganyaan, the NISAR satellite with NASA, and the Aditya-L1 solar observatory mission to study the Sun's corona. Long-term visions include the establishment of a Bharatiya Antariksha Station by 2035 and crewed lunar exploration.